Helping Verbs Grammar Exercises: Level A2-B1 (with Answers)

'Have' is correct because 'have not finished' forms the present perfect tense with a plural subject 'they'. 'Has' is used only with singular subjects, 'did' requires the base form, and 'are' cannot form the present perfect.

True because helping verbs (auxiliary and modal verbs) precede the main verb to form a verb phrase, such as 'She is running' or 'He can swim'.

'Must' expresses necessity or obligation. It does not express ability (that is 'can'), permission (that is 'may'), or a future plan (that is 'will').

The correct order is 'She has never been to London' because the auxiliary verb 'has' comes before the adverb 'never', which is followed by the past participle 'been'.

'He does not like spicy food' is correct because 'does' is the auxiliary verb used with third-person singular subjects in negative present simple sentences. 'Do not likes' is wrong because 'likes' should be the base form after 'do not'. 'Does not likes' incorrectly adds -s to the main verb. 'He not like' is missing the auxiliary verb entirely.

'May' is correct here because it expresses permission in response to a request. 'Must' expresses obligation, 'should' expresses advice, and 'would' expresses a conditional or polite request, not permission.

'She can speak three languages' correctly uses 'can' to express ability — a skill the subject possesses. The other options use 'can' in contexts of permission or requests, not ability.

The correct order is 'Do you think he will pass the exam?' because in a question, the auxiliary 'do' comes first, followed by the subject, then the main verb, then the second auxiliary 'will' with its verb phrase.

'Should' is correct because it expresses advice or recommendation in this context. 'Might' expresses possibility, 'would' requires a conditional clause, and 'could' expresses past ability or possibility but not a strong recommendation.

Modal verbs such as 'can', 'will', 'must', and 'should' are always followed by the base form (infinitive without 'to') of the main verb. They do not change form for third-person singular subjects and are not used alone as the main verb.

'Was explained' is correct because to form the passive voice in the past simple, we use 'was/were' (the auxiliary 'be' in past tense) followed by the past participle. 'Explained' alone is missing the auxiliary, 'has been explained' is present perfect, and 'is explained' is present simple passive.

Helping verbs serve different functions: 'be' forms continuous and passive structures, 'have' forms perfect tenses, 'do' forms questions and negatives, and modal verbs express meanings like ability or obligation.

False because 'be', 'do', and 'have' can function as either main verbs or auxiliary verbs depending on the sentence. For example, 'I have a car' uses 'have' as a main verb, while 'I have finished' uses it as an auxiliary.

'She might come to the party later' is correct because 'might' expresses possibility without certainty. 'Will' expresses a definite future action, 'must' expresses obligation or strong certainty, and 'should' expresses advice or expectation.